Osg 519032517 Spotting Drill 0.25in 140deg Solid Carbide

Product Description

The OSG 519032517 is a solid carbide spotting drill designed to create accurate center marks and guide holes for follow-on drilling operations. With a 140-degree point angle, this tool produces a clean, concentric seat that minimizes drill wander and improves hole-location accuracy across a wide range of workpiece materials. The 0.25-inch cutting diameter and straight cylindrical shank make it compatible with standard drill chucks and collet holders. At 75 mm overall length and weighing just 0.07 pounds, the 519032517 is suited for CNC machining centers, drill presses, and manual mills. The EgiAs coating provides enhanced lubricity and wear resistance for extended tool life in production environments.

This spotting drill is intended for general-purpose spotting and centering applications in metalworking and precision machining. It is well suited for shops performing production runs or prototype work where consistent hole placement is critical. The 2-flute spiral configuration with a 25-degree helix angle promotes efficient chip evacuation. Right-hand cutting direction makes it appropriate for standard CNC and manual spindle setups. Machinists, toolmakers, and CNC operators working with ferrous and non-ferrous materials will find this tool fits into common tooling programs without special holders.

Key Features

• 140-degree point angle for precise spot location and reduced drill wander
• Solid carbide construction for rigidity and wear resistance in production use
• EgiAs coating improves lubricity and extends tool life under continuous use
• 2-flute spiral design with 25-degree helix angle for effective chip evacuation
• Straight cylindrical shank fits standard collets and drill chucks without adapters
• Right-hand cut compatible with all standard CNC and manual spindle directions

Compatibility

Designed as a general-purpose spotting drill for use in standard straight-shank collet chucks and drill chuck toolholders on CNC machining centers, drill presses, and milling machines requiring a 0.25-inch shank diameter.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power isolated per shop lockout-tagout procedures. Ensure the collet or chuck bore matches the 0.25-inch shank diameter and that the tool is seated and clamped to the full depth recommended by the toolholder manufacturer. Do not exceed the toolholder manufacturer's stated runout tolerance, as excessive runout accelerates carbide tool wear. Refer to the machine tool builder's programming documentation and OSG cutting data recommendations for appropriate speeds and feeds.